Cisco Catalyst 2955 Series Switches - Datasheet

Cisco Catalyst 2955 Series Switches - Datasheet
Data Sheet
Cisco Catalyst 2955 Series Switches
®
®
Cisco Catalyst 2955 Series Switches are industrial-grade switching products that
provide wire-speed Fast Ethernet and Gigabit Ethernet connectivity for deployment in
harsh environments. The Cisco Catalyst 2955 Series operates in environments such as
industrial networking solutions (industrial Ethernet deployments), intelligent transportation
systems (ITS), and transportation network solutions. It integrates into military equipment,
Supervisory Control and Data Acquisition (SCADA) systems, power generation systems,
waste water treatment facilities, building automation systems, warehouses, and any other
facilities or applications where the environmental conditions or suspended solid
concentrations exceed the specifications of other commercial switching products.
The Cisco Catalyst 2955 Series uses industrial-grade components, a compact form
factor, convection cooling, and relay output signaling to extend intelligent services such as
enhanced security, high availability, and advanced quality of service (QoS) to areas that
cannot be served by traditional commercial-grade Ethernet switches.
Embedded in all Cisco Catalyst 2955 Series Switches is the Cisco Device Manager software,
which allows users to easily configure and monitor the switch using a standard Web browser,
eliminating the need for more complex terminal emulation programs and knowledge of the
command-line interface (CLI). Customers can easily initialize the switch with Web-based Cisco
Express Setup, without using the CLI. In addition, with Cisco Network Assistant, a standalone
network management application, customers can simultaneously configure and troubleshoot
multiple Cisco Catalyst desktop switches. Cisco Device Manager, Cisco Express Setup, and
Cisco Network Assistant reduce the cost of deployment by enabling less-skilled personnel to
set up switches quickly. Furthermore, Cisco Catalyst 2955 Series Switches provide extensive
management tools using Simple Network Management Protocol (SNMP) network management
platforms such as CiscoWorks.
®
This product line offers Cisco IOS Software functionality for traditional data, video, and voice
services, with enhanced intelligent services features for additional security, advanced QoS, and
high availability. Intelligent services are critical in supporting the reliability and determinism of
proprietary Layer 2 solutions typical of industrial Ethernet deployments, while providing the
advantages (standardization, open connectivity, bandwidth, integration, etc.) of an advanced
Ethernet switching architecture. These intelligent services include Layers 2-4 traffic prioritization,
rate limiting, and security filtering, helping to ensure the high uptime, low latency, deterministic
performance, and data integrity critical for industrial automation control networks.
Cisco Catalyst 2955 Series Switches consist of the following devices:
Cisco Catalyst 2955T-12—Twelve 10/100 ports and two fixed 10/100/1000BASE-T uplink
ports
Cisco Catalyst 2955C-12—Twelve 10/100 ports and two fixed 100BASE-FX multimode
uplink ports
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Data Sheet
Cisco Catalyst 2955S-12—Twelve 10/100 ports and two fixed 100BASE-LX single-mode
uplink ports
Intelligence in the New Ethernet Networks
Currently, non-Ethernet Layer 2 networks are evolving from traditional field buses or proprietary
technologies to standards-based Ethernet networks. The progression to Ethernet is driven by a
multitude of factors, including:
Standardization—There are hundreds of millions of Ethernet devices around the world;
Ethernet has become the prevalent Layer 2 technology based on widely adopted
standards.
IP Connectivity—Ethernet is the most ubiquitous Layer 2 technology for Internet
connectivity, in turn providing unprecedented communications potential to networks that
have been traditionally isolated.
Bandwidth—Orders of magnitude above other existing technologies, Ethernet takes
advantage of the increased computational power of the new network hosts (I/O devices,
motion machinery, sensors, intelligent electronic devices, etc.) being deployed today. This
allows for real-time control and data gathering for a multitude of applications that were not
previously feasible, including preventive maintenance, total quality control monitoring,
remote monitoring, and asset management and optimization.
Multiple services on a single infrastructure—Intelligent Ethernet allows a single network
to carry multiple vendor implementations of control (EtherNet/IP, Modbus TCP, Foundation
Fieldbus High Speed Ethernet [HSE] and various Advanced Traffic Management Systems
[ATMSs]), and to use the same investment to also deliver traditional voice (telephony), data
(e-mail, technical support, and browsing), and video services (video monitoring).
Multilayer Integration—All of the elements described above allow for the integration of
higher-level applications such as enterprise resource planning (ERP), manufacturing
execution systems (MES), and advanced traffic management systems to the floor control
layer (programmable logic controllers [PLCs], PC-based control systems, traffic control
equipment, and human-machine interfaces [HMIs]). This allows for a true flow of data and
automation from the demand side (customer placing and order) to the factory floor
(assembly line) or from the monitoring devices in a freeway all the way to the emergency
response systems, as well as real-time control in SCADA applications. As organizations
increasingly rely on Ethernet networks, it is important to help ensure high availability,
security, scalability, and control. By adding Cisco IOS Software functionality to new network
applications, users can now deploy network-wide intelligent services that address these
requirements in a consistent way—from the I/O or monitoring device to the core and
through the WAN.
Network Security through Advanced Security Features
Cisco Catalyst 2955 Series Switches offer enhanced data security through numerous security
features. These features allow customers to enhance network security with capabilities to secure
traffic through the protection of passwords and configuration information; to provide options for
network security based on users, ports, and Media Access Control (MAC) addresses; and to
enable more immediate reactions to intruder and hacker detection.
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Data Sheet
Secure Shell (SSH) Protocol and SNMPv3 protect information from tampering or eavesdropping
by encrypting information being passed along the network, thereby guarding administrative
information. Private VLAN Edge isolates ports on a switch, helping ensure that traffic travels
directly from the entry point to the aggregation device through a virtual path and cannot be
directed to another port.
Port-based access control parameters (ACPs) restrict sensitive portions of the network by
denying packets based on source and destination MAC addresses, IP addresses, or Transmission
Control Protocol/User Datagram Protocol (TCP/UDP) ports. ACP lookups are done in hardware,
so forwarding performance is not compromised when implementing this type of security in the
network. In addition, time-based ACPs allow configuration of differentiated services based on
time periods. ACPs can also be applied to filter traffic based on differentiated services code point
(DSCP) values. Port security provides another means to help ensure that appropriate users are on
the network, by limiting access based on MAC addresses.
For authentication of users with a Terminal Access Controller Access Control System (TACACS+)
or RADIUS server, 802.1x provides port-level security. 802.1x in conjunction with a RADIUS
server allows for dynamic port-based user authentication. 802.1x-based user authentication can
be extended to dynamically assign a virtual LAN (VLAN) based on a specific user, regardless of
where that user connects on the network. This intelligent adaptability provides greater flexibility
and mobility to the network's stratified user populations. By combining access control and user
profiles with secure network connectivity, services, and applications, customers can more
effectively manage user mobility and drastically reduce the overhead associated with
granting and managing access to network resources.
With multilayer Cisco Catalyst 2955 Series Switches, network managers can implement high
levels of console security. Multilevel access security on the switch console and a Web-based
management interface prevent unauthorized users from accessing or altering switch
configurations. TACACS+ or RADIUS authentication enable centralized access control of the
switch and restrict unauthorized users from altering the configuration. Deploying security can be
done through Cisco Network Assistant security wizards, which ease the deployment of security
features that restrict user access to a server, a portion of the network, or the entire network.
Network Control through Advanced QoS and Rate Limiting
Cisco Catalyst 2955 Series Switches offer superior and highly granular QoS based on Layers 2–4
information, to help ensure that network traffic is classified and prioritized, and that congestion is
avoided in the best possible manner. These switches can classify, reclassify, police (determine if
the packet is in or out of predetermined profiles and affect actions on the packet), and mark or
drop the incoming packets before the packet is placed in the shared buffer. Packet classification
allows the network elements to discriminate between various traffic flows and to enforce ratelimiting policies based on Layer 2 and Layer 3 QoS fields.
To implement QoS, these switches first identify traffic flows or packet groups. They classify or
reclassify these groups using the DSCP field in the IP packet and/or the 802.1p class of service
(CoS) field in the Ethernet packet. Classification and reclassification can also be based on criteria
as specific as the source or destination IP address, source or destination MAC address, or the
Layer 4 TCP/UDP ports. At the ingress (incoming port) level, Cisco Catalyst 2955 Series Switches
can also perform policing and marking of the packet.
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Data Sheet
After the packet goes through classification, policing, and marking, it is assigned to the appropriate
queue before exiting the switch. Cisco Catalyst 2955 Series Switches support four egress
(outgoing port) queues per port, allowing the network administrator to be more discriminating and
specific in assigning priorities for the various applications on the network. At the egress level, the
switch performs scheduling—an algorithm that determines the order in which the queues are
processed. The switches support Weighted Round Robin (WRR) scheduling, strict priority queuing
or strict priority scheduling. The WRR scheduling algorithm helps ensure that lower-priority
packets are not entirely starved for bandwidth and are serviced without compromising the priority
settings administered by the network manager. Strict priority scheduling helps ensure that higherpriority packets will always get serviced first, ahead of other traffic in lower-priority queues.
These features allow for prioritization of mission-critical, such as motion-control traffic, critical I/O
or sensor data, video monitoring of security areas over voice (IP telephony traffic), ERP (Oracle,
SAP, etc.), and CAD/CAM, which, in turn, would be scheduled to have precedence over less timesensitive applications such as FTP or e-mail (SMTP). For example, it would be highly undesirable
to have a large file download destined to one port on a switch and have quality implications, such
as increased latency in industrial control traffic, destined to another port on the switch. This
condition is avoided by helping ensure that the control traffic is properly classified and prioritized
throughout the network. Other applications, such as Web browsing, can be treated as low priority
and handled on a best-efforts basis.
Cisco Catalyst 2955 Series Switches allocate bandwidth based on several criteria, including
MAC source address, MAC destination address, IP source address, IP destination address, and
TCP/UDP port number. Bandwidth allocation is essential in network environments that require
service-level agreements, or when it is necessary for the network manager to control the
bandwidth given to certain users. Cisco Catalyst 2955 Series Switches support up to six policers
per Fast Ethernet port and up to 60 policers on a Gigabit Ethernet port. This gives the network
administrator granular control of the network bandwidth.
Network Availability
To provide efficient use of resources for bandwidth-hungry applications like multicasts (common in
producer-consumer data distribution models), intelligent Cisco Catalyst 2955 Series Switches
support Internet Group Management Protocol (IGMP) snooping in hardware. Through the support
and configuration of IGMP snooping via Cisco Network Assistant, Cisco Catalyst 2955 Series
Switches deliver outstanding performance and ease of use in administering and managing
multicast applications on the LAN.
The IGMP snooping feature allows the switch to "listen in on" the IGMP conversation between
hosts. When a switch hears an "IGMP join" request from a host for a given multicast group, the
switch adds the host's port number to the group destination address (GDA) list for that group.
When the switch hears an "IGMP leave" request, it removes the host's port from the Content
Addressable Memory (CAM) table entry.
Per VLAN Spanning Tree Plus (PVST+) allows users to implement redundant uplinks while
distributing traffic loads across multiple links. This is not possible with standard Spanning-Tree
Protocol implementations. Cisco UplinkFast technology helps ensure immediate transfer to the
secondary uplink, a vast improvement over the traditional 30-to-60-second convergence time.
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Data Sheet
Network Management
Customers can configure one switch at a time with the embedded Cisco Device Manager or
configure and troubleshoot multiple switches with Cisco Network Assistant, a standalone network
management software application optimized for LANs of small and medium-sized businesses with
up to 250 users. Cisco Device Manager offers a simple and intuitive GUI interface for configuring
and monitoring the switch. The software is Web-based and embedded in Cisco Catalyst 3750,
3650, 3550, 2970, 2960, 2955, 2950, and 2940 Series Switches. Cisco Device Manager reduces
the cost of deployment by enabling less-skilled personnel to quickly and simply set up switches.
Cisco Network Assistant software provides an integrated management interface for delivering
intelligent services, such as multilayer switching, QoS, multicast, and security ACLs. Cisco
Network Assistant software allows administrators make use of benefits formerly reserved for only
the most advanced networks without having to learn the CLI, or even the details of the technology.
With Cisco Network Assistant, customers can configure multiple ports and switches
simultaneously, perform software updates across multiple switches at once, and copy
configurations to other switches for rapid network deployments. Bandwidth graphs and link reports
provide useful diagnostic information, and the topology map gives network administrators a quick
view of the network status. Cisco Network Assistant supports a wide range of Cisco Catalyst
intelligent switches from Cisco Catalyst 2940 through Cisco Catalyst 4506. Through a user-friendly
GUI, users can configure and manage a wide array of switch functions and start the device
manager of Cisco routers and Cisco wireless access points.
The Cisco Network Assistant Software Guide Mode leads the user step by step through the
configuration of advanced features and provides enhanced online help for context-sensitive
assistance. Cisco AVVID (Architecture for Voice, Video and Integrated Data) wizards provide
automated configuration of the switch to optimally support video streaming or videoconferencing,
voice over IP (VoIP), and mission-critical applications. In addition, Smartports offers a set of
verified feature macros per connection type in an easy-to-apply manner. With these macros,
users can consistently and reliably configure essential security, availability, quality of service,
and manageability features recommended for Cisco Business-Ready Campus solutions with
minimal effort and expertise. These wizards and Smartports can save hours of time for network
administrators, eliminate human errors, and help ensure that the configuration of the switch is
optimized for these applications.
In addition to Cisco Network Assistant software, Cisco Catalyst 2955 Series Switches provide
extensive management tools using SNMP network management platforms such as CiscoWorks.
Managed with CiscoWorks, Cisco Catalyst switches can be configured and managed to deliver
end-to-end device, VLAN, traffic, and policy management. Coupled with CiscoWorks, Cisco
Resource Manager Essentials, a Web-based management tool, offers automated inventory
collection, software deployment, easy tracking of network changes, views into device
availability, and quick isolation of error conditions.
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Data Sheet
Enhanced Hardware Features
The Cisco Catalyst 2955 Switch has been designed for deployment in harsh environments.
Through the use of special thermal design techniques and industrial-rated components, the
Cisco Catalyst 2955 is rated to operate at extreme temperatures (-40° to 60° C; -40° to 140° F).
Robust mechanical specifications allow for its deployment as a mobile platform and under extreme
vibration and shock environments (50G trapezoidal shock pulse). The compact form factor, DIN
rail mounting, and dual cabling orientations facilitate its deployment into industrial enclosures,
traffic control cabinets, and transportation vehicles. Two normally open relays can be associated
with the different port alarms, power alarms, and high temperature conditions to send an output
signal to other external mechanisms (visible or audible alarms, for example), HMIs, or PLCs for a
controlled shutdown. Dual power inputs provide for optional redundant power supplies,
guaranteeing an even higher level of resiliency and reliability.
Figure 1.
Cisco Catalyst 2955 Series Switches
Table 1.
Product Features and Benefits
Feature
Benefit
Availability
Superior redundancy for fault
backup
IEEE 802.1D Spanning-Tree Protocol support for redundant backbone
connections and loop-free networks simplifies network configuration and
improves fault tolerance.
Support for Cisco Spanning-Tree Protocol enhancements such as UplinkFast,
BackboneFast, and PortFast technologies helps ensure quick failover
recovery, enhancing overall network stability and availability.
IEEE 802.1w Rapid Spanning-Tree Protocol (RSTP) provides rapid
convergence of the spanning tree, independent of spanning tree timers.
Per VLAN Rapid Spanning Tree (PVRST+) allows rapid spanning-tree
reconvergence on a per-VLAN spanning-tree basis, without requiring the
implementation of spanning-tree instances.
Provides unidirectional link detection (UDLD) and Aggressive UDLD for
detecting and disabling unidirectional links on fiber-optic interfaces caused
by incorrect fiber-optic wiring or port faults.
Integrated Cisco IOS Software
features for bandwidth optimization
Bandwidth aggregation of up to 4 Gbps (two ports full duplex) through Cisco
Gigabit EtherChannel® technology and up to 1.6 Gbps (eight ports full duplex)
through Fast EtherChannel technology enhances fault tolerance and offers
higher-speed aggregated bandwidth between switches, to routers and
individual servers. Port Aggregation Protocol (PAgP) is available to simplify
configuration.
VLAN1 minimization allows VLAN1 to be disabled on any individual VLAN
trunk link.
Per-port broadcast, multicast, and unicast storm control prevents faulty end
stations from degrading overall system performance.
Per virtual LAN (VLAN) Spanning Tree Plus (PVST+) allows for Layer 2 load
sharing on redundant links, to efficiently use the extra capacity inherent in a
redundant design.
IEEE 802.1s Multiple Spanning Tree Protocol (MSTP) allows a spanning-tree
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Data Sheet
Feature
Benefit
instance per VLAN, enabling Layer 2 load sharing on redundant links.
VLAN Trunking Protocol (VTP) pruning limits bandwidth consumption on VTP
trunks by flooding broadcast traffic only on trunk links required to reach the
destination devices. Dynamic Trunking Protocol (DTP) enables dynamic trunk
configuration across all ports on the switch.
Internet Group Management Protocol Version 3 (IGMPv3) snooping provides
for fast client joins and leaves of multicast streams and limits bandwidthintensive video traffic to only the requestors. Multicast VLAN Registration
MVR, IGMP filtering, and fast-join and immediate leave are available as
enhancements. The number of IGMP groups can be limited with IGMP
throttling. IGMP Snooping time can be adjusted to optimize the performance of
multicast data flows.
MVR continuously sends multicast streams in a multicast VLAN while isolating
the streams from subscriber VLANs for bandwidth and security reasons.
Supports additional frame formats: Ethernet II (tagged and untagged), 802.3
(SNAP encapsulated, tagged and untagged frames).
Security
Network Security Features
Filtering of incoming traffic flows based on Layer 2, Layer 3, or Layer 4 ACPs
prevents unauthorized data flows.
The following Layer 2 ACPs or a combination can be used for security
classification of incoming packets: source MAC address, destination MAC
address, and 16-bit Ethertype.
The following Layer 3 and Layer 4 fields or a combination can be used for
security classification of incoming packets: source IP address, destination IP
address, TCP source or destination port number, UDP source, or
destination port number. ACLs can also be used to filter based on DSCP
values.
Time-based ACLs allow configuration of differentiated services based on
time periods.
Private VLAN edge provides security and isolation between ports on a switch,
helping ensure that voice traffic travels directly from its entry point to the
aggregation device through a virtual path and cannot be directed to a different
port.
Support for the 802.1x standard allows users to be authenticated, regardless
of which LAN port they are accessing, and provides unique benefits to
customers who have a large base of mobile (wireless) users accessing the
network.
IEEE 802.1x with VLAN assignment allows a dynamic VLAN assignment for
a specific user, regardless of where the user is connected.
IEEE 802.1x with voice VLAN gives an IP phone access to the voice VLAN,
regardless of the authorized or unauthorized state of the port.
IEEE 802.1x with port security authenticates the port and manages network
access for all MAC addresses, including the clients'.
IEEE 802.1x with guest VLAN allows guests without 802.1x clients to have
limited network access on the guest VLAN.
SSHv2 and SNMPv3 provide network security by encrypting administrator
traffic during Telnet and SNMP sessions. SSHv2 and the crypto version of
SNMPv3 require a special crypto software image because of U.S. export
restrictions.
Port Security and unicast MAC filtering secure the access to a port based on
MAC addresses. The aging feature of port security removes the MAC address
from the switch after a specific time frame to allow another device to connect
to the same port. Unicast MAC filtering allows non-IP packets to be filtered as
well.
With unknown unicast/multicast port blocking, the switch will not flood packets
with unknown destination MAC addresses to all Ethernet ports. Unknown
unicast/multicast port blocking disables flooding on a per-port basis.
MAC address notification allows administrators to be notified of new users
added or removed from the network.
Spanning-tree root guard (STRG) prevents edge devices not in the network
administrator's control from becoming Spanning-Tree Protocol root nodes.
The Spanning-Tree Protocol PortFast/bridge protocol data unit (BPDU) guard
feature disables access ports with Spanning-Tree Protocol PortFast enabled
upon reception of a BPDU, and increases network reliability, manageability,
and security.
Multilevel console access security prevents unauthorized users from altering
the switch configuration.
TACACS+ and RADIUS authentication enables centralized control of the
switch and restricts unauthorized users from altering the configuration.
The user-selectable address-learning mode simplifies configuration and
enhances security.
Trusted Boundary provides the ability to trust the QoS priority settings if a
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Data Sheet
Feature
Benefit
Cisco IP phone is present and to disable the trust setting if the IP phone is
removed, preventing a rogue user from overriding prioritization policies in the
network.
IGMP Filtering provides multicast authentication by filtering out nonsubscribers
and limits the number of concurrent multicast streams available per port.
Support for dynamic VLAN assignment through implementation of VLAN
Membership Policy Server (VMPS) client functionality provides flexibility in
assigning ports to VLANs. Dynamic VLAN enables fast assignment of IP
addresses.
SPAN support of intrusion detection systems (IDSs) to monitor, repel, and
report network security violations.
Cisco Network Assistant software security wizards ease the deployment of
security features for restricting user access to a server, a portion of the
network, or the network.
QoS
Overview
The switches support the aggregate QoS model by enabling classification,
policing/metering, and marking functions on a per-port basis at ingress and
queuing/scheduling functions at egress.
The switches support configuring QoS ACPs on all ports, using ACPs to help
ensure proper policing and marking on a per-packet basis. Up to four ACPs
per switch are supported in configuring either QoS ACPs or security filters.
Automatic QoS (Auto-QoS) greatly simplifies the configuration of QoS in
voice-over-IP (VoIP) networks by issuing interface and global switch
commands that allow the detection of Cisco IP phones, the classification of
traffic, and egress queue configuration.
QoS Classification
Support at Ingress
The switches support QoS classification of incoming packets for QoS flows
based on Layer 2, Layer 3, and Layer 4 fields.
The following Layer 2 fields (or a combination) can be used for classifying
incoming packets to define QoS flows: source/destination MAC address or 16bit Ethertype.
The switches support identification of traffic based on Layer 3 type of service
(ToS) field DSCP values.
The following Layer 3 and Layer 4 fields (or a combination) can be used to
classify incoming packets to define QoS flows: source/destination IP address,
TCP source/destination port number, or UDP source/destination port number.
QoS metering/policing at ingress
Support for metering/policing of incoming packets restricts incoming traffic
flows to a certain rate.
The switches support up to six policers per Fast Ethernet port, and 60 policers
on a Gigabit Ethernet port.
The switches offer granularity of traffic flows at 1 Mbps on Fast Ethernet ports,
and 8 Mbps on Gigabit Ethernet ports.
QoS marking at ingress
The switches support marking and remarking packets based on the state of
policers/meters.
The switches support marking and remarking based on the following
mappings: from DSCP to 802.1p, and from 802.1p to DSCP.
The switches support 14 well-known and widely used DSCP values.
The switches support classifying or reclassifying packets based on the default
DSCP per port, and support classification based on DSCP values in the ACL.
The switches support classifying or reclassifying frames based on the default
802.1p value per port.
The switches support 802.1p override at ingress.
QoS scheduling support at egress
Four queues per egress port are supported in hardware.
The WRR queuing algorithm helps ensure that low-priority queues are not
starved.
Strict Priority Scheduling helps ensure that time-sensitive applications such as
voice always follow an expedited path through the switch fabric.
Sophisticated traffic management
The switch offers the ability to limit data flows based on MAC source or
destination address, IP source or destination address, TCP/UDP port
numbers, or any combination of these fields.
The switch offers the ability to manage data flows asynchronously upstream
and downstream from the end station or on the uplink.
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Data Sheet
Feature
Benefit
Management
Superior manageability
An embedded Remote Monitoring (RMON) software agent supports four
RMON groups (history, statistics, alarms, and events) for enhanced traffic
management, monitoring, and analysis.
The switch supports all nine RMON groups through the use of a Cisco
SwitchProbe® Analyzer Switched Port Analyzer (SPAN) port, permitting traffic
monitoring of a single port, a group of ports, or the entire switch from a single
network analyzer or RMON probe.
A SPAN port monitors traffic of a single port from a single network analyzer or
RMON probe.
Remote SPAN (RSPAN) allows network administrators to locally monitor ports
in a Layer 2 switch network from any other switch in the same network.
DHCP Snooping Option 82 enables more sophisticated IP address
assignment by the DHCP server.
The Domain Name System (DNS) provides IP address resolution with userdefined device names.
Trivial File Transfer Protocol (TFTP) reduces the cost of administering
software upgrades by downloading from a centralized location.
Network Timing Protocol (NTP) provides an accurate and consistent
timestamp to all switches within the intranet.
Layer 2 traceroute eases troubleshooting by identifying the physical path that a
packet takes from the source device to a destination device.
Crash Information Support enables the switch to generate a crash file for
improved troubleshooting.
Show Interface Capabilities provides information on the configuration
capabilities of any interface.
RTTMON-MIB allows users to monitor network performance between a Cisco
Catalyst switch and a remote device.
Cisco Network Assistant software
Cisco Network Assistant software is free, standalone network management
application software that simplifies the administration of networks of up to 250
users. It supports a wide range of Cisco Catalyst intelligent switches from
Cisco Catalyst 2940 through Cisco Catalyst 4506. With Cisco Network
Assistant, users can manage Cisco Catalyst switches plus launch the device
managers of Cisco integrated services routers (ISRs) and Cisco Aironet®
WLAN access points by simply clicking their icon in the topology map.
Cisco AVVID wizards use just a few user inputs to automatically configure the
switch to optimally handle different types of traffic: voice, video, multicast,
and/or high-priority data.
A security wizard is provided to restrict unauthorized access to servers and
networks and to restrict certain applications on the network.
One-click software upgrades can be performed across multiple switches
simultaneously, and configuration cloning enables rapid deployment of
networks.
Cisco Network Assistant software supports multilayer feature configurations
such as ACPs and QoS parameters.
Cisco Network Assistant Software Guide Mode assists users in the
configuration of powerful advanced features by providing step-by-step
instructions.
Cisco Network Assistant software provides enhanced online help for contextsensitive assistance.
Easy-to-use GUI provides both a topology map and front-panel view of the
switches.
Multidevice and multiport configuration capabilities allow network
administrators to save time by configuring features across multiple switches
and ports simultaneously.
User-personalized interface allows users to modify polling intervals, table
views, and other settings within Cisco Network Assistant software and to retain
these settings the next time they use Cisco Network Assistant.
Alarm notification provides automated e-mail notification of network errors and
alarm thresholds.
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Data Sheet
Feature
Support for CiscoWorks
Benefit
Manageable through CiscoWorks network management software on a per-port
and per-switch basis, providing a common management interface for Cisco
routers, switches, and hubs.
SNMPv1, v2, and v3 (non-crypto) and Telnet interface support deliver
comprehensive in-band management, and a CLI-based management console
provides detailed out-of-band management.
Cisco Discovery Protocol versions 1 and 2 enable a CiscoWorks network
management station to automatically discover the switch in a network
topology.
CiscoWorks is supported by the CiscoWorks 2000 LAN Management
Solution.
Ease of use and
ease of deployment
Cisco Device Manager is embedded Web-based software that allows the
customer to easily configure and troubleshoot the switch, eliminating the need
for more complex terminal emulation programs and CLI knowledge, and
reducing the cost of deployment by enabling less-skilled personnel to quickly
and simply set up switches.
Smartports offers a set of verified feature macros per connection type in an
easy-to-apply manner. With these macros, users can consistently and reliably
configure essential security, availability, quality of service, and manageability
features recommended for Cisco Business-Ready Campus solutions with
minimal effort and expertise.
Autoconfiguration eases the deployment of switches in the network by
automatically configuring multiple switches across a network via a boot server.
Autosensing on each Ethernet port] detects the speed of the attached device
and automatically configures the port for 10-, 100-, or 1000-Mbps operation,
easing the deployment of the switch in mixed 10, 100, and 1000BASE-T
environments.
Autonegotiating on all ports automatically selects half- or full-duplex
transmission mode to optimize bandwidth.
Cisco VTP supports dynamic VLANs and dynamic trunk configuration across
all switches.
DTP enables dynamic trunk configuration across all ports in the switch.
Voice VLAN simplifies telephony installations by keeping voice traffic on a
separate VLAN for easier network administration and troubleshooting.
Dynamic Trunking Protocol (DTP) enables dynamic trunk configuration across
all ports on the switch.
PAgP automates the creation of Cisco Fast EtherChannel or Gigabit
EtherChannel groups, enabling linking to another switch, router, or server.
Link Aggregation Control Protocol (LACP) allows the creation of Ethernet
channeling with devices that conform to IEEE 802.3ad. This is similar to Cisco
EtherChannel and PAgP.
The default configuration stored in Flash helps ensure that the switch can be
quickly connected to the network and can pass traffic with minimal user
intervention.
All contents are Copyright © 1992–2006 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
Page 10 of 15
Data Sheet
Table 2.
Product Specifications
Feature
Performance
Description
13.6 Gbps switching fabric
Cisco Catalyst 2955T-12: 6.4 Gbps maximum forwarding bandwidth
Cisco Catalyst 2955C-12: 2.8 Gbps maximum forwarding bandwidth
Cisco Catalyst 2955S-12: 2.8 Gbps maximum forwarding bandwidth
(Forwarding rates based on 64-byte packets)
Cisco Catalyst 2955T-12: 4.8 Mpps wire speed forwarding rate
Cisco Catalyst 2955C-12: 2.0 Mpps wire speed forwarding rate
Cisco Catalyst 2955S-12: 2.0 Mpps wire speed forwarding rate
8 MB memory architecture shared by all ports
Up to 32 MB SDRAM and 16 MB Flash memory
Configurable up to 8000 MAC addresses
Management
BRIDGE-MIB
CISCO-ACCESS-ENVMON-MIB
CISCO-BULK-FILE-MIB
CISCO-C2900-MIB
CISCO-CDP-MIB
CISCO-CLUSTER-MIB
CISCO-CONFIG-MAN-MIB
CISCO-ENTITY-ALARM-MIB
CISCO-ENTITY-MIB
CISCO-ENVMON-MIB
CISCO-FLASH-MIB
CISCO-FTP-CLIENT-MIB
CISCO-HSRP-MIB
CISCO-IGMP-FILTER-MIB
CISCO-IMAGE-MIB
CISCO-LAG-MIB
CISCO-MAC-NOTIFICATION-MIB
CISCO-MEMORY-POOL-MIB
CISCO-PAE-MIB
CISCO-PAGP-MIB
CISCO-PORT-SECURITY-MIB
CISCO-PRIVATE-VLAN-MIB
CISCO-PROCESS-MIB
CISCO-PRODUCTS-MIB
CISCO-RTTMON-MIB
CISCO-STACKMAKER-MIB
CISCO-STP-EXTENSIONS-MIB
CISCO-SYSLOG-MIB
CISCO-TCP-MIB
CISCO-VLAN-MEMBERSHIP-MIB
CISCO-VTP-MIB
ENTITY-MIB
ETHERLIKE-MIB
HC-RMON-MIB
IEEE8021-PAE-MIB
IEEE8023-LAG-MIB
IF-MIB
IP-MIB
OLD-CISCO-CPU-MIB
OLD-CISCO-FLASH-MIB
OLD-CISCO-INTERFACES-MIB
OLD-CISCO-IP-MIB
OLD-CISCO-MEMORY-MIB
OLD-CISCO-SYSTEM-MIB
All contents are Copyright © 1992–2006 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
Page 11 of 15
Data Sheet
Feature
Description
OLD-CISCO-TS-MIB
RFC1213-MIB
RFC1398-MIB
RMON-MIB
RMON2-MIB
SMON-MIB
SNMP-FRAMEWORK-MIB
SNMP-MPD-MIB
SNMP-TARGET-MIB
SNMPv2-MIB
TCP-MIB
UDP-MIB
Standards
IEEE 802.1x support
IEEE 802.1w Rapid Spanning Tree Protocol (RSTP)
IEEE 802.1s Multiple Spanning Tree Protocol (MSTP)
IEEE 802.3x full duplex on 10BASE-T, 100BASE-TX, and 1000BASE-T ports
IEEE 802.1D Spanning-Tree Protocol
IEEE 802.1p CoS prioritization
IEEE 802.1Q VLAN
IEEE 802.3 10BASE-T specification
IEEE 802.3u 100BASE-TX specification
IEEE 802.3ab 1000BASE-T specification
IEEE 802.3ad Link Aggregation Control Protocol (LACP)
IEEE 802.3ah Ethernet in the First Mile (EFM)
RMON I and II standards
SNMPv1, SNMPv2c, and SNMPv3
Connectors and cabling
10BASE-T/100BASE-TX ports: RJ-45 connectors; four-pair Category 5 UTP
cabling
1000BASE-T ports: RJ-45 connectors; four-pair Category 5 UTP cabling
100BASE-FX ports: MT-RJ connectors; 50/125 or 62.5/125 micron multimode fiberoptic cabling
100BASE-LX ports: LC connectors; 9/125 micron single-mode fiber-optic cabling
Management console port: 8-pin RJ-45 connector, RJ-45-to-RJ-45 rollover cable
with RJ-45-to-DB9 adapter for PC connections; for terminal connections, use RJ45-to-DB25 female data-terminal-equipment (DTE) adapter (can be ordered
separately from Cisco, part number ACS-DSBUASYN=)
MT-RJ patch cables for
Cisco Catalyst 2955
Type of cable, Cisco part number
One-meter, MT-RJ-to-SC multimode cable, CAB-MTRJ-SC-MM-1M
Three-meter, MT-RJ-to-SC multimode cable, CAB-MTRJ-SC-MM-3M
Five-meter, MT-RJ-to-SC multimode cable, CAB-MTRJ-SC-MM-5M
One-meter, MT-RJ-to-ST multimode cable, CAB-MTRJ-ST-MM-1M
Three-meter, MT-RJ-to-ST multimode cable, CAB-MTRJ-ST-MM-3M
Five-meter, MT-RJ-to-ST multimode cable, CAB-MTRJ-ST-MM-5M
Two-meter, LC to SC single-mode cable, CAB-CP-LCSC-2M
Indicators
Per-port status LEDs: Link integrity, disabled, activity, and indications
Dual-power-supply indicators
Major and minor alarm-relay indicators
Dimensions and weight
(HxWxD)
3.78x8.07x5.03 in. (9.60x20.50x12.78 cm): Connectors facing forward
5.03x8.07x3.78 in. (12.78x20.50x9.60 cm): Connectors facing downward
3.0 lb (1.4 kg)
Relay contacts
Surge withstand between open contacts: 1500V, FCC Part 68
Surge withstand between contact and coil: 2500V, Bellcore
Maximum switching capacity: 1A @ 30 VDC
Maximum switching voltage: .3A @ 125 VAC
All contents are Copyright © 1992–2006 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
Page 12 of 15
Data Sheet
Feature
Environmental ranges
Description
Recommended operating temperature range: -40° to 140° F (-40° to 60° C)
Recommended storage temperature range: -40° to 185° F (-40° to 85° C)
Operating relative humidity: 10 to 95% (noncondensing)
Operating altitude: 9843 ft (3000 m) @ 104° F (40° C)
Storage altitude: Up to 29,500 ft (9000 m)
Shock: 50 g trapezoidal shock (meets or exceeds ASTM D3332)
Vibration: 500 Hz (meets or exceeds MIL-STD-810, Method 514.5)
Power requirements
External 24V (dual-redundant DC input, screw-down connectors)
Power consumption: 23W maximum, 78.53 BTU/hour
18V minimum; 32V maximum
Predicted mean time
between failure (MTBF)
WS-C2955T 235,022 hours
WS-C2955C 206,378 hours
WS-C2955S 205,115 hours
Telcordia SR-332 Gf
Fiber port specifications
100BASE-FX (MT-RJ connectors @ 1,300 nm):
Optical receiver sensitivity: -30 dBm
Optical transmitter power: -19 to -14 dBm
Maximum distance: 2 km
100BASE-LX (LC connectors @ 1,300 nm):
Optical receiver sensitivity: -38 to -31 dBm
Optical transmitter power: -15 to -8 dBm
Maximum distance: 15 km
Regulatory Agency Approvals
Safety certifications
CE Marking
Hazardous locations
UL 60950
CSA 22.2/60950
TUV GS: CB Report to IEC 60950
UL 508
CSA 22.2/142
AS/NZS 3260
NOM
UL 1604—Class I, Div 2 Group A, B, C, D
CSA 22.2/213—Class 1, Div 2 Group A, B, C, D
EN 50021—Class I, Zone 2
Electromagnetic emissions
certifications
FCC Part 15 Class A
ICES-003 Class A
EN 55022: (CISPR22 Class A)
EN 55024: (CISPR24)
VCCI Class A
AS/NZS CISPR 22 Class A
VCCI Class 1
CE Marking
CNS 13438
BSMI Class A
MIC Class A
EN 61131-2
EN 55011 (CISPR 11) Class A
ITS
NEMA TS-2
Warranty
Limited five-year warranty
External DIN Rail Mountable Power Supply
Input voltage
AC100-120/220-240V (switchable) 47-63 Hz
Input current
<1.3A (switch in 115V position)
Input current
<0.7A (switch in 230V position)
Output voltage
24 VDC (+5%, -1%)
Size (WxHxD)
1.92x4.92x4.05 (50x125x103 mm)
All contents are Copyright © 1992–2006 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
Page 13 of 15
Data Sheet
Feature
Description
Weight
1 lb (460 g)
Worldwide approvals
UL, EN, CSA, and CB
Overload protection
Over 1.5 times normal current
Cooling
Normal convection cooling
Temperature range
-25º to +85ºC (storage)
-10º to +60ºC (operating)
Service and Support
The service and support programs described in Table 3 are available as part of the Cisco Desktop
Switching Service and Support solution, and are available directly from Cisco and through
resellers.
Table 3.
Cisco Service and Support Programs
Service and Support
Features
Benefits
Advanced Services
Total Implementation Solutions
(TIS)—available direct from Cisco
Project management
Supplements existing staff
Site survey and configuration
deployment
Helps ensure that functionality
meets customer needs
Packaged Total Implementation
Solutions (Packaged TIS)—available
through resellers
Installation, text, and cutover
Mitigates risk
Training
Major moves, adds, or changes
Design review and product staging
Technical Support Services
Cisco SMARTnet® and SMARTnet
Onsite—available direct from Cisco
24x7 access to software updates
Packaged SMARTnet—available
through resellers
Telephone support through the
Technical Assistance Center
Web access to technical
repositories
Advance replacement of hardware
parts
Table 4.
Enables proactive or expedited
issue resolution
Lowers cost of ownership by
using Cisco expertise and
knowledge
Minimizes network downtime
Ordering Information
Model Numbers
Configuration
WS-C2955T-12
Twelve 10/100 ports and two 10/100/1000BASE-T ports
WS-C2955C-12
Twelve 10/100 ports and two 100BASE-FX ports
WS-C2955S-12
Twelve 10/100 ports and two 100BASE-LX ports
PWR-2955-AC=
DIN Rail mountable 24V power supply (85 to 264 VAC, or 90 to 375VDC input)
STK-RACKMNT-2955=
DIN Rail Adapter for 19" rack mounting
For More Information on Cisco Products
United States and Canada: 800 553-NETS (6387)
Europe: 32 2 778 4242
Australia: 612 9935 4107
Other: 408 526-7209
http://www.cisco.com
All contents are Copyright © 1992–2006 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
Page 14 of 15
Data Sheet
Printed in USA
All contents are Copyright © 1992–2006 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
C78-380621-00 11/06
Page 15 of 15
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